Revert of Add DidSaveScrollOrScaleState flag to prevent restoreScrollPosition...

third_party/WebKit/Source/core/loader/HistoryItem.cpp

Index: third_party/WebKit/Source/core/loader/HistoryItem.cpp
diff --git a/third_party/WebKit/Source/core/loader/HistoryItem.cpp b/third_party/WebKit/Source/core/loader/HistoryItem.cpp
index 3756e2c5298340d1471bd3d3d728a712a0bc9b99..c61b5c1ae316c4f7a2970908dda85ab0e80d8046 100644
--- a/third_party/WebKit/Source/core/loader/HistoryItem.cpp
+++ b/third_party/WebKit/Source/core/loader/HistoryItem.cpp
@@ -42,8 +42,7 @@ static long long GenerateSequenceNumber() {
 }
 
 HistoryItem::HistoryItem()
-    : did_save_scroll_or_scale_state_(false),
-      page_scale_factor_(0),
+    : page_scale_factor_(0),
       item_sequence_number_(GenerateSequenceNumber()),
       document_sequence_number_(GenerateSequenceNumber()),
       scroll_restoration_type_(kScrollRestorationAuto) {}
@@ -83,7 +82,6 @@ const ScrollOffset& HistoryItem::VisualViewportScrollOffset() const {
 
 void HistoryItem::SetVisualViewportScrollOffset(const ScrollOffset& offset) {
   visual_viewport_scroll_offset_ = offset;
-  SetDidSaveScrollOrScaleState(true);
 }
 
 const ScrollOffset& HistoryItem::GetScrollOffset() const {
@@ -92,7 +90,6 @@ const ScrollOffset& HistoryItem::GetScrollOffset() const {
 
 void HistoryItem::SetScrollOffset(const ScrollOffset& offset) {
   scroll_offset_ = offset;
-  SetDidSaveScrollOrScaleState(true);
 }
 
 float HistoryItem::PageScaleFactor() const {
@@ -101,7 +98,6 @@ float HistoryItem::PageScaleFactor() const {
 
 void HistoryItem::SetPageScaleFactor(float scale_factor) {
   page_scale_factor_ = scale_factor;
-  SetDidSaveScrollOrScaleState(true);
 }
 
 void HistoryItem::SetDocumentState(const Vector<String>& state) {